Under-thread mechanism for sewing-machines.



PATBNTED JAN. 7, 1.908.

J. VANNETTE. UNDER THREAD MECHANISM FOR SEWING MACHINES.

APPLIQATION FILED FEB. 23. 1906.

I 511W [1'06 Jagveriwmmffi ssim is emo PATENTED JAN. 7, 1908." J. VANNETTE. UNDER THREAD MECHANISM FOR SEWING MACHINES.

APPLIUATION FILED FEB.23,1906.

7 SHEETS-SHEET 2.

06 new;

PATENT'BD JAN. 7, 1908.

J. VANNETTE. THREAD MECHANISM FOR SEWING MACHINES.

UNDER APPLICATION FILED FEB. 28, 1906.

Jnvwtoz '5. VANNETTE.

UNDER THREAD MECHANISM FOR SEWING MACHINES.

APPLICATION FILED rm. 2a. 1906.

PATENTED JAN. 7, 1908 7 SHEETS-SEER? Ill/Ill WWYL anus: 1 for No 875,751. BATBNTED JAN. 7. 1908.

J. VANNETTB.

UNDER THREAD MECHANISM FOR SEWING MACHINES.

' APYLIOATION FILED FEB.23.1906.

7 SHEETSSHEET 5.

PATENTED JAN. '2, 1908. J. VANNETT 1. UNDER THREAD MECHANISM FOR SEWING MACHINES.

APPLICATION FILED FEB. 23, 1906.

7 SHBETS SHEET 6 b his gin/wk LVN names No. 875,751. PATENTED JAN."7, 1908.

J. VANNETTE.

UNDER THREAD MECHANISM FOR SEWING MACHINES APPLICATION FILED mm. 23. 1906.

7 SHEETSSHBET 7.

hio, have invented cer unrrisn @FFXCE JASPER VANNETTE, OF TlFl i'N, Oii'iO, ASSIGNUR OF ()NEFOURTH TO CHARLES .T. YINGLIN G AN D ONE-FD U lt'lil Ti) GEO RUE lit-TE EtIEi A I! Ml? {iii-Ii I YlNGLlNG, OF TIFFIN, OHIO.

snwme-meemnss.

Patented Eon. '7, 1908.

Application iilti ii 'orniry 23.1998. Serial No. 302.613.

T 0" all whom it may 'H'HCs-TIH'L' Be it known that l, Jssrnu Va citizen of the United States, 1r Tiflin, in the county of need and state in no: and use Improvements in limler ihn ii, a

' is a specification. v

This invention relates to sowing mac apes and more particularly to loch-stitch sewing machines of that class in which both the "opper and under thread is diret; from the ordinary commercial spool of sewing thread; the invention consisting of improvements on a sewing machine of the class referred to dis: closed in Letters Patent No. 813,929, issued to me February 27, 1906.

In'the machine of my atoresai eating movement for passage needle-thread loop during the s11: operation and is slida oly 'fr-sme which also has a i'eoipioi'ae ment but in a direction in oppo direction of n'iovenreni' of ihz spied, movement of said from:- om the position of a thread-p L L cut-out with which. it provided from one loop about the spool ior interior: ment with the undenthread and ol such operation with aininirnun ion lim tl'ireadl {loops ing with and frame 'are'ineans for ,tuh'in" loop -from the needle and pass' spool comprising s rotary 1M? operative in a path at one side ct initially seize the thread-loop thr the needle and open the some; ro n" he, spreader operative a path ext versely around the path of TQC'Y spool to engage one sidaof the ow loop held eyesidhool: and coir the hook passing the throini lo one end of the spool to be ps through; and s loop-pusher oper path at one side the p nth of nn'iveinz "001 to engage one side of the llng'threed-loop end on it a in a direction; movement of the spool so as to ositive sndnspid go or the ongxtudmsliy sh ut spool,

m 5 Aim": ill 1 for Sewin -Maehines, of which the following l in the machine oi my present application I L retain the eneral features referred to of the 1 f nmcn'mc cl my aforesaid patent but with some ct them in an improved form. For instance, in the prior machine the reciprocav spool supporting frame embodied two i-illned pins or plungers which engaged the spool within its central opening to slidably support the same and its ease and which were arranged with an opening or cut-out between their adjacent ends for the passa e of the needlo-tln'ead loop in being passe around the spool. Experience, however, has demonstrated the fact that when the spool is slidor pins and a coil or coils of thread become is quite liable to happen, such loosened thread becomes entangled about the supnorting pins and prevents proper operation it the inacl'linc. A further objection to suporting the spool on centrally engaging pins is the delay and inconvenience attending the insertion and removal of the spool to and 'l on its operative position; it being necessary in placing or inserting a spool into operative position in the machine to first insert the spool into its case, then shift one of sp'ool supporting pins from its normal position to a position to receive said spool and case thereon, and thereafter to shift the pin back to its normal position.

Because of the objections noted, among others, it has been one of the objects of my present invention to provide an improved us for slida bly supporting the spool and use by means of which the said objecmehle features will be avoided. To this end I slid-ably connect the s moi-case, prefershly' at its exterior side, directly with the trams, whereby said spool-casewill present an open and unobstructed chamber to receive and contain the spool and into and from which chamber the spool may be read ii inserted and removed without change .or adjustment of parts other than the shifting asuitable spool-retaining latch at the open pool'zeceivii1g end of the case. p 'lur'her and important feature of my sent invention resulting from the connecthe spool-ease at its exterior side with procetory supporting frame is the fact our enabled to utilize said frame as a "FTQLi-Sbfil, "for moving the threed loop lonably supportedrby centrally engaging parts loosened from the spool and slip over its end, i

10. gaging arms without undue cndwJse 1novegitudinally along the spool-case and thus combine in one element the supporting frame and loop-pusher of my prior machine. In the machine of my aforesaid patent the spool was givenits reciprocating movement by a driver having arms loosely engaging the opposite ends of the spool-containing case, and as it was desirable that the spool-case should be of a substantially predetermined length to properly fit between the driver ennent other than enough to permit of the passage of the thread-loop between the parts, and as it was also desirable that the spool should be loosely held within the case against undue endwise movement, it was necessary to employ a series of cases specially adapted to contain the different sizes of commercial spools. In my present machine, howevenalthough the spool'is also given its reciprocating movement by a driver having arms loosely engaging the opposite ends of the spool-case as in the prior machine, the

- necessity of employing more than one spoolcase for diflerent sizes of spools is avoided by reason of the spool-case being supported directly by the frame and providing an open or unobstructed spool-rece1ving chamber which sizes.

and to the spool as to provide the required thread-clearance space for such passage of the thread but without permitting undue endwise movement of the spool therebetween. I have, therefore, as a further and important feature of my present invention, provided means for automatically spacing the spool-en aging end walls of the spool case relative y to different sizes of spools insorted into the spool-case to provide in every instance the same predetermined threadclearance space between the parts.

e Other features of my present invention not 'hereinbefore referred to will be herein after described in the detailed description which follows and then pointed out in the claims and are illustrated in theaccompanying drawings, in which Figure 1 is a side elevation of a machine 5 embodying my invention with the arm partly broken away and with the .bedplate in sec tion on line 1 1 of Fig. 2. Fig. 2 is a bottom or underside view of the machine. Fig. 3 is a front end elevation of the machine with the parts above the bed-plate removed. Fig. 4 is a vertical section, taken on line 44 of Fig. 1, showing by full and dotted lines different positions assumed by the connecting pitman between the upper and lower shafts at di" erent times during the operation of the machine, and also showing the parts beneath the bediilate at the forward end of the machine in a different position fromthat shown in the preceding figures. Figs. 5 and 6 are enlarged sectional detail views of the spool-' case and driver showing the operation of 1 parts in effecting an adjustment of the end walls of the spool case relatively to an inserted spool. Figs. 7, 8 and '9 are detail views in bottom plan, showing the position of the spool-case and certaincooperating parts for passing the needle thread-loop around said spool-case, 'at different times during the operation of the machine. Figs. 10, 11, 12, 13 and 14 are also detail views,'but

spool-case and certaincooperating parts for passing the needle-thread loop around said. spool-case, at different times during the opin elevation, showing the position of theeration of the machine, and Figs' 15, 16 and 17 are further detail views in elevation of the same parts, and also-of thespool-case frame partly broken away, looking from the left as shown in Figs; 1.014.

Similar reference charactersdcsignate like parts in the several figures of the drawings. Y

My improvements relate mainly to the looper mechanism and associated underthread mechanism at the under side of the bed-plate of the machine and may be ap, plied to any suitable machine" having suit-" able cooperating needle and take-up mechanism.

The machine shown in the drawings to which my improvements are applied co m-' prises a bed-plate 1 having an overhanging arm 2, a vertically reciprocating needle-bar 3 supported by the arm 2 and carrying a needie 4, atake-up 5 also supported by the arm 2, and ainupper driving shaft 6 .journaled in the arm 2 for actuating the said needle-bar and the take-up.

Located at the under side of the bed-plate 1 is the reciprocating spool-case Therein shown as of a cylindrical form to contain a correspo 'idingly shaped commercial spool, and being supported by a sliding connection at its exterior side with the reciprocatory frame 8 which in turn is supported by a sliding connection with the bed-plate 1. The

ment of said parts relatively to eachother sliding connection between. the-spool case 7* and the frame 8 may be effected byany suit able means to permit of a reciprocating-move I with the spool-case maintained against transver'se rotary movement, the means employed in the present case for effecting such 60111160". tion comprisingan elongated relatively wide 1 portion 9 ofthe frame 8 extending at its-oppositelstersl edges into longitudinally arranged grooves 16, 10, on the exterior side of 1 the spool-case; the said spool-caseengaging portion 9 of the frnmedbein shown as transversely curved to conform to the adjacent well of the spooi-case. The sl-idable connec tionof t c said frame 8 withthe bed-plate or other suitable support may also be eficcted in any desired or suitablemanner, it being effected in the present case by meons'of arms 11,, 11, on. the frame 8 extending into tronswill oo in being iiessed mound the adjacent en of the spool-case to a position 'stthe positeend-of seicl spool-case to permit of tie withdrawal therefrom of the threed-loop os it is acted upon by the tsire-upto be drawn sit with the unnormancc of the i 0 going or cut-out to the opening or cut-outbointerlocking der 'tl'ireod u. 1 function stett corresponds tween the set. porting pins'of t patent. Anoti r vided for in the pr said opening or on of the frame 8 b the exterior pushing the n o :r 1. along the speob; or spread eroun icons pro-"v ed pusl'iing the '2 she ed port 14 eonoe oi the frame portion pr viding a machine-of my said prior iv however, proining portion 9 operative tit .,,oo-cs.sc is that of i ioop longitudirmlly it has been passed id case; the

comprising a U- i l edjecent ends if, opening 13 and which with s thre through said opening -13 ts and mi the stated, The 'reciproco ry i no may be scursted ,bysny sun e means, the means herein shown compri rig e rotary driving shaft 16 journaled'in bearings i7, 17, at the under side of the bed-plots I, and a lever 18 mounted on a iiyrr-d pivot stud 19 slso,l0- cated at the under SH 0 of the bcd-plorte,- the.

said'lever at one end having connection with a, crank 20 in the driving shaft through link 21 and at its opposite end having connection withthe frame 8 through a. link 'With this arrangement of ports the lever 18 re ceives a vibretin novomrnt from the drivmg shaft 16 and 1 turn imports to the frame 8, its described i'eciprocsting i'oovenient;

ct ends of the spoolsupby reason of the i as in the i The spool-case is actuated to receive its reciprocating movement in a direction in 0pposition to the direction ofmovenf nt-of its supporting frame 8 by means of's, suitable "driver loosely engaging the spool-case at its opposite ends. This driver, which will presently be described, may also beactuotcd y any suitable means, the means herein shown com )rising in driver-carrying frame 23 Sllditbly held to the under side of the herb plate 1 b means of beaded lugs 24;24', en-

gaging t 1e same through elongated guide slots 25, 25', and being operzttively connected with thecrank-driven link 21 by means of a.

block 26 pivotally connected to said link and engaging theframo within an elongated slot 27 therein. With this arrangement of arts both the driver supporting frame 23 am the spool-casc supporting frame 8 are reciproceted from the driving shaft 16 by connec tion with the crank-driven link 21, the movement of said frames in a direction in 0 posi-' tion to each other eing obtained by t e intor ,sition of the le or 18 between the said lin' 2] and the spool-case supporting frame 8.

The spool-case driver, as most clearly shown in Figsfoand 6, comprises heel and toe ortions 28 and-29 for engaging re'spec tive with the rear and front ends of the spec -case and being connected by an intermediate portion 30 srrangcd'ot the under side of said spool-case. l.he'drive'r'a,s thus formed 18, provided with an arm orextension 31 at thoupfier cnd of its heel portion 28 which is rigl y attached to the driver-carrying'fr mnc 23 ,by suitable fastening means, The too portion 29 of,

such as the screw 32. the Sitld driver 18 shown as having a pivotal connection 33 with the lOWGIdl'iX'QI portion I 30, whereby it mny be moved from its I101- mitl' position opposite the open. front end of the. spool-case to permit of either the inser-' tion of a spool into said case or its removal therefrom; the sa d toe 29 servlng, when 111 its normal 0 eruptive position opposite the i open end of t 1e spool-case, as a latch for removcbly retaining the spool within Sflld case.

As commercial spools of thread vary considerably in size, both in length and diameter, it is necessary, when only one case is provided f or containing different sizes of spools mode suhciently large to accommodate a maximum size of spool. It "is desirable, however, for the proper operation of the machine, that the spec undue cndwise movements within the case, as a too free endwisc movement ofthe spool would obviously result in an excess'ldo'sening and unwinding of the thread from' thefpresent instance, that such case be should be held ogair'ist spool and a consequent entengling-of the same in the case such would prcventfthe proper passage of the thread from said case and also cause a breakage of the some. Therefore, to prevent, any undue endwise movement within,the spool-case of a spool under maximum size, I have located at the inner end of the spool-case an adjustable wall '34 which, together with the driver arm or latch 29 at the front end of the ease, form the end walls of the spool-case between which the spool is loosely held. The said adjust able wall 34 ma be supported and rendered adjustable to vary the spool-receiving space plate. 36 fixedly held to the rear end of the.

driver and having upper and lower guide flanges 37, 37, between which the plate'3-5 is slid ably held.

end with the plate 35 at .40 operates to yieldingly hold said plate 35 irra normal position with its front end wall 34 sufficiently far advanced into the spool-case as to render the spool-receiving space between it and the opposite end wall 29 small enough to closely receive a spool. of minimum size, and permit said wall 34 to yield against the pressure of an inserted spool to adapt the spoolreeeiving space to any size of. spool ranging between a minimum and maxim-um size To insert a spool into the spool-case, the latch 29 constituting the front end wall of the spoolcase is swung laterally aside to open the spool-case, after which a spool is inserted into the ease and moved against the pressure of the yielding wall 34 until it is'sufiieiently far inserted to permit closing of the end wall latch 29. When a spool is thus inserted into its ease hmvever, it is yieldingly held with its ends in engagement with the opposite end walls 34, 29, of the spool-case, while it is desirable that suflicient space he provided between the spool and the adjacent endwalls of the case to permit oi" the ready passage of 1 the needle-thread loop therebetween' without undue friction on the thread. For this reason I provide a means that is operative subsequent .to the entry ol' a spool into the ease for moving the adjustable wall'34 a predetermined d stance in a (11160131011 to increase the spool-receivmg space between it and the opposite end wall whereby the de;

sired thread-passage space between said Walls and the spoolwill be provided. The

said' means for so moving the adjustable wall 34 may be more or less varied, but the same as herein shown comprises a lever 42 Till-.-

erumed on a pivot stud 43 on the driver bracket-arm 36 ancl'having a dog 44 for engagement with a series of teeth 45 located on A spring 38 connecting at one end with the driver at 39 and 'at its opposite is j'ieldingl y held in a position with the upper wall of the said opening in contact with the pivot by means of a coiled spr1ng48 located within an elongated opening in the lever and expanding therein between a reiativelyfixed wall 49 and a movable block 50, which latter is provided with a transversely arranged pin 51 seated therein with its ends extending through oppositely located elongated slots 52 in the lever 42 to limit the movement of the block relatively-to the lever, and with one of its said ends,"indicated. at 51, extend- I ing into engagement with the under side of the bracket plate 36; the engagement of the said pin end 51 with the plate 36 operating to limit the upward movement of the block 50 and thereby causingthe spring 48 to normally exert a downward pressure against the lever. With this described combination and arrangement of parts, when the lever is swung forward in a direction toward the spool-case its dog 44 will be released from engagement with the teeth 45 of the wall plate 35 and the latter will be free tolbe moved either forward under the action of the spring 38 or backward under the pressure of an inserted spool; the said lever 42 being movably held in its said inoperative position of non-engagement with the wall plate 35 by means of preferably rounded projection 53 on the under side of the bracket-arm 36 engaging with the rear side of the projection or pin 5] on the lever block 50. With the wall plate 35 thus free from locked position, when a spool is inserted into the spool-case it will be engaged at its opposite ends by the 'end walls of the spool-case in manner as hereinbefore described and as shown in Fig.

5.. To now provide the desired thread-clearance space between the spool and adjacent end walls of the spool-case, the lever 42 is swung backward from its said plate-releasoi the wall-plate 35 as given by the lever 42 being determined in the present instance by the length of the elongated pivot opening 47 ,in the said lever, the lower end wall of which opening is brought into'contact with the pivot 43 to limit the described backward and plate-retracting,movement of the lever 42 by reason of the lever dog 44 being vieldingly held in contact with the cooperating plate 35 and being caused to fulcrum thereon as said plate is moved backward in a line and thereby lmpart a slight longitudinel movement to the lever on its pivot sullit lent to bring the said lower end well of the ope ing 47 into Contact with the pivot. in etfecting such vbeelnverd movement of the lever 42, its vieldinglj'supported pin to shifted to the rear side of the pi'oiertiou on the bracket-arm which projertii i. serves as a locking projettion l'or rooperetir with the said spring-pressed pin .51" to hold the lever either in its 'li'irwi'n'd plate-relenising: po-

sition or in its backward plate-limiting position.

The means for locating 1L spool in the spoolcase and adjusting the spool-engaging end Walls of the latter to hold spools ot varying sizes against undue endwise movement in the case with a proper thread-clearance space I between said wells and the spool have now been described. When it is now desired to remove the spool for anypurpose, the front end wall or latch 29 is first swung littfll'illy from its position opposite the front end of the (rise and the lever 42 is then swung forward to release the walhplete 35, whereupon the letter will be projected forward in the ose under the action of the spring PR and operate to eject the spool from the case; the said plate 3,3 thus serving both as on iidjustable end wall for the spool-raise and also as an nutoimitir spool-ejector.

hen the under-thread rnrrying spool inserted into the spool .'use it rests duet-ti upon the bottom or lower wall oi the ease.

This is desirable for the reason that it prevents a too tree rotation of the spool as the thread is drawn therefrom during the stittli forming operation and also prevents the loosened (oils of thread slipping oil the ends oi" the spool. A desired tension may be placed on the thread as it is drzuvn from the spool by means of impinging tension-plates 55, 55, located at the exterior side of the spool-case and between which the thread may be readily plated when the spool is inserted into the ease by menus of (L threadingslot 56 leading therebetween and opening at.

' the front end of the ('use.

The means for seizing the thread-loop thrown-out by the needle and passing it latter with its contained spobl entered through com )rises 11 loop-sihzmg ,chine of my aforesaid patent.

reedy entry intothe needlereceiving a partial or as shown in ii 2.) and 15, operates to open the loop to considerable Width and i o ess mie t well-defined triangular i the l'orwnird or upper side thereof in h of the loop-spreader 60, which hr us toward iLh-l'lflill tunes in e path n snlmisntn iily at right angles to of the path of the loop-seizing eugenics the said l'orwerd side of reed loop, as show u in i'ligs. 11nnd\15, 1 i oirries the smile over nhtl across one end tit; spool-came and through the opening oi the frame :1. This loop spi' ender'moves :i generell eireulzir pnthoround the end the spootense s'nd, as it eugiriigesm'ne side the loop and carries it over .h'nd across the rod oi the spool, the hoot: .58 with its enr nged portion oi the loopj continues its downvnrrd movement and nuts in' combination with the loop spronderto pass the loop entirely around the end of the spool-case whereliiy the hitterwith its contained spool may be passed therethrough.

in the drnwings, is :15 follows: The loop-seiz my; blade first enters the needle-thread loop thrown out by the needle as shown in Fig. 10

and el'trr l'ully entering the some, causes the loop to receive it pertiel turn as one slde The detailed ooerntron of the parts intakthereof pssses wound to the rear end of the blade 218 shown in Figs. 11 and .15, whereby the sides ol the loop will be opened apart in a direction substmitinlly at right angles'to the phone of the path of movement of the loop sprezider. ontinuing, its movement, the loop-seizing blade causes the loop to assume :1 triangular shape with the sides widely stvpurnted and the upper side in the path of the loop-spreader which new advances to engage the same in said Figs. it and 15. After the parts have reached ti hitter position, the loop-spreader continues to move forward and the loop-seizing hook downwind, as in Figs. 12, 16 and 7, until they reach the position shown in Figs. 13, l-"Z imd til. whioh time the spreader has carried one side oi the loop from the needleoprning oi. the thrinits-plate over the upper side of the sq'ioolwnse and through the open ing: 13 of the frame 8, while the spreader and hook together have carried the intermediate portion of the, loop across the end of the spoohcnse and between the adjacent ends of the spool zmd spool-case well 20 to a position at the under. side of the spool-case, the combined operoi ion of the hooknnd spreader (amusing the tliIifiHblOOl) to completely enriiio the spool-rose. During such action .ho nan-ts in passing the thread-loop of the s ioolwase, the frame ease are being moved in a direction in opposition to each other, the timing of the parts being such that as soon as theloop is carried through the opening 13 in the frame Slat the front end of the spool-case, as in Fig. 16, the position of the said opening '13 is quickly shifted to the opposite or rear end of the spool-case to permit of the release of the thread-loop and its being drawn up by the takeup to interlock with the under thread (as in Fig. 14) in the formation of .a stitch in the usual manner; the said thread-loo passing between the rear end of the spool and the adjacent end Wall of the spool-case when beingdrawn up by the take-up subsequent to its passing off the rear end of the spooicase. After the thread-loop has been passed through the opening 18 in the frame 8 at the front end of the spool-case as described, it is positively moved toward the opposite or rear end of the spool-case by the combined action of the loop-seizing hook 58 and the loop-pusher 1 5 operating at opposite sides of the spoolcase, the action of the said loop-pusher on the thread-loop being most clearly shown in Fig. 17. In the described operation of passing the needle-thread loop around the spoolcase, the thread-loop is carried around the front end of the spool-case, between such end and the spool-case-driver arm 29, and then moved along the spool-case between the latter and the adjacent part 30 of the spool-case-driver to the rear end of the spool-case, and is then drawn up by the take-up in the usual manner through the spac tween the rear end of the spool-case and the rear spool-case-driver arm 2S.

The looper-spreader 60 is herein shown in the form of a threartengaging finger carried at the upper end of a verticallyl ranging arm 61 which is formed an extension of a horizontally-ranging shank portion 62 attached.

to the spreader operating mechanism; the said arm portion 61 being of sullicient length to permit the front end of the spool-case being received between the'iinger 60 and shank 6'2 during the operation of the parts as will hereinafter be described. The operating mechanism for this loop-spreader device 60-61-62 comprises a horizontally swing ing arm 63 pivoted at one end on a stud 64 at the under side of the bedplate and having mounted thereon a tubular rocker shaft 65 which is provided with two downwardly projecting arms 66, 66, to one of which the s reader shank (i2 is rigidly attached and to t in other of which one end of a pitman 67 is pivotally connected by means of an extended bearing sleeve 68, which said pitman at its opposite end has a pivotal connection with a crank 65) in the driving shaft 16 through the medium of a loosely jointed collar 70. With this described combination and arrangement of parts between the. spreader and driving shaft, rotation of the crank 69 operates through the pitman 67 to cause the rocker shaft to both rock about its longitudinal axis on the arm 63 and also swing about the axis of the pivot stud 64; which compound movement 'ofthe rocker-shaft 65 results in the attached loop-spreader being moved in its described generally circular path about the end of the spool case with a gyratory motion.

The described means for operating the loop-spreader from a crank in the driving shaft is an improvement over the cam and roller system of the machine of my aforesaid patent in that an easier and more positive movement of the parts is secured; and furthermore, the gyratory movement imparted to the loop-spreader results in such a change of angular position of the spreader finger 60 laterally relatively to the general plane of its path of movement about the spool as to cause the end of its finger to enter the threadloop at one angle when moved into engagement therewith, as shown in Fig. 11, and to thereafter be shifted to an opposite angle when releasing thla thread-loop, as shown in Fig. 13; the angular position of the spreaderiinger when engaging the loop being such as to assure a positive retention of the loop in engagement therewith, and the"changed angular position when releasing the loop being such as to assure a free release or cast-off of the loo 1.

The l ably be rotated with a mmimum degree of differential motion and any suitable means may be provided for such purpose. In the present instance, the said lower or secondary driving shaft 16 is o erated from the upper or primary driving s iaft 6 through the me- 'dium of a connecting rod or pitman 75 which at its upper end connects with a crank 76 in the shalt 6 and at its lower end carries a stud 77 engaging a block 78 slidably sup orted 1n ower driving shaft 16 should prefer-- a grooved crank-arm 79 on the sha t 16. At 1 a point centrally between its ends the pitman 75 is also connected with a fulcrum-bar 80 by means of a stud 81 on one part entering a corres )onding seat or o ening in the other, and which said fulcrumar 80 at its opposite ends and at points equi-distant from its center fulcrum is )ivotally connected with two links 83, 83, w rich are respectively ivoted on fixed studs 84, 84, attached to tie ma-' chine arm at opposite sides of the pitman 75.

This combination of parts provides a central;

fulcrum for the pitman'75 which is controlled by the links 83, 83, 'to move in a straight vertical line whereby the driving end of the pitman will have imparted thereto a substantially uniform rotary movement.

What lclain1 is:

l. in a sewing machine, the combination with the needle and its operating mechanism, of a case for containing the und'erthread supply, a frame havinga movable connection with said case exteriorly of the contained thread supply to support the same and also havin an opening or cut-out for the assage theret rough of the needle-thread 00p m 'being passed around the case, means for operatmg said case and frame to move each m a direction opposite o'the other and means for passing a needle-thread loop around the case. I a

'2. In a sewing machine, the combination with the needle and its operating mechanism, of a case for containing the under-thread sup ly, a frame having a sliding connection wit said case exteriorly of the contained. thread supply to support the same and also havin an o ening or out-out for the )assage there-t roug of the needle-thread loop in being passed around the case, means for operating said case and frame to move each m a direction opposite to the other, and means for passing a needle-thread loop around the ease.

3.' In a sewing machine, the eomhination with the needle and itsoperating mechanism. of a case for containing the under-thread sup ly, a frame having a sliding eonn'eetion. \\lt said ease exteriorly thereof to support the same and also having an opening or eutout for the passage therethrough of the needle-thread loop vin heing passed around the case, means for operating. said ease and frame to move each in. a direction opposite to the other, and means for passing a needlethread loop around the ease.

4. In a seeing machine, the combination with the needle and its operating mechanism, of a case for containing the under-thread supply, aframe having a direct sliding eonneetion uith said ease exteriorly of the contained thread supply to support the same and 'also having an opening or cut-out for the passage theret-hrough of the needle-thread oop in being passed around the ease, means for operating said ease and lraine to move eaeh in a direction opposite to the other, and meansfor passing a needle-threml loop around the rash.

5. In a se'aing maehine, the combination with the needle and its operating meehanism, of at ease for containing the umler-threari supply having a guide, a frame cooperating -\\-ith the guide of said ease to slidahly supportthe latter and also having an opening or cut-out for the passage therethrough of the needle-thread loop in lremg passed around the ease, means for operating said ease and frame to move eaz'h in a dire 'tion opposite to the other, and means for passing a needlethread loop around the me.

-(i in a serving unu-hine. the eoml-ination \\ith the needle and its operating lll(l lianism, of a spool carry ing the under-thread supply, a ease for eontaining said spool having exteriorly lorated guides, a frame oi'iperating with the guides of said ease to slidalily sup port the latter and .fls

the case, means for or supply, a frame sup cut-out for the p needle-thread loop op 'iosi'le to a needle frame to move eat a in the other, and means thread loop around I 7.' In a seaing n n ith the needle and. its 0f aease for eontan pension and having an opening r rn'ieout for the passage theretl rough thread loop in heing passed an 1 the ease. means for operating said. rose and frame to move eaeh in a direition i)rt(- li to the other, and means for par-sing a m-eilledhread loop around the ease.

b. In a sewing mm'hiu the rozniination ith the needle and its l x aiingnnw-hanism, of a ease for eontaining the uruler-thread supply, a frame having a movalile ronnehtion with said ease exteriorl y' oi the eontziined thread supply to support the same and also having an opening or ut-out for the passage. therethrough of the needletln-ead-loop in heing passed around the ease, means for op erating said (use and frame to move each in a dirertion opposite to the other. means for passing a thread loop around the ease, and a loop-pusher earried hy the said frame to move in a path at one side of the use.

9. In a sewing machine, the romhination with the needle and its operat ing llltPKlltliiiSU-l, of at ease for (-ontaining the miller-thread supply, a frame having a movahle eonneetion nith' said ease exteriorly of the contained thread supply to support the same and also having an opening or out-out for the pass: theretlirough of the needle thread loop in heing passed around-the raise, one wall of said opening or rut-out (onstituting a loop pusher, means for operating said ease and frame to move earh in a dirertion opposite to the other, and means for passing a thread loop around the ease.

10. In a sewing machi e, the con'iliinziition with the needle and its operating met aniaon, of a case for receiving loosely therein the under-threladcarrying spool, end walls for said case one of which is adjustahle relaltivel to the other in a direction to vary the epoo i said ease and il I t e needle;

receiving space therehetween, and means for passing a needle-thread loop around said case.

11. In a sewing machine,-the eomhination with the needle and its operating mechanism, of a ease for receiving loosely therein the under-threail-carrying spool, end walls for said case one of which is yieldingly adjustwhine the winliination iii-1mg :mmiaiusin,

of a case for receiving loosely therein the under-threstd-carrying spool, end walls for said case one of which is spring-pressed and adjustable relatively to the other in a direction to vary the spool re'ceiving space therebetween, and means for passing a needlethread loop around said case.

13. In a sewing machine, the combination with. the needle and its operating mechanism, of a case for receiving loosely therein the under-thread-carrying spool end walls for said case one of which is adjustable relatively to the other in a direction to vary the spoolreceiving space therebetween, and the other of which is movable in a direction to permit of the insertion or removal of a spool into or from said case, and means for passing a needle-thread loop around said case.

14. In a sewing machine, the combination with the needle and its operating mechanism, of a case for receiving loosely therein the under-tln-ead-carrying spool, end walls for said case one of which adjustable relatively to the other in a direction to vary the spoolreceiving' space thcrebetween, means inde. pendentof the spooll'or holding said. adjustable wall in adjusted. position, amlmeans for passinga nemlle-thread loop around said case. 1.5. in a sewing n'iachine, the combination with the needle and its operating mechanism, of a case for receiving loosely therein the under-tl1read-carrying spool, end walls for said case one of which is yieldingly adjust able relatively to the other in a direction to vary the spool-receivingspace therebetween, moans independent of the spool for holding said adjustable wall in adjusted position, and means for passing. a needle-thread loop around said case. 4

16. in a sewing machine, the combination wi; h tin. needle and its ')perat-ing mechanisn'i, of a case for receiving loosely therein the under-threadecarrying spool, end walls for said case one of whichis adjustable relatively to the other in a direction to vary the spoolroeeiving space therebetwcon, means operative subsequent to the entry of a spool into the case for removing said adjustable wall in a direction to increase the said spool-reconing space between it and the opposite end all, and means for passing a needle-thread loop around said case.

17, in a sewing machine, the combination with the needleand itsoperating mechanism, of a. case For receiving loosely therein the in'ulerdln'ea:l-rarrying spool, end v-ialls for said case one ol' which is adjustable relatively to tlnother in a direction to vary the spoolrereiving space tlnrs'obotween, means operative subsequent to the entry of a spool into the var-e l'or moving said adjustable wall a predelerinincd distance in a oimction to increase the said spools-reviving space between it and the opposite end wall, and means lor passinganeedle-thread loop around saidcase. 1

18. In a sewing machine, the combination.

with the needle and its operating mechanism, of a case for receiving loosely therein the under-thread-carrying spool, end Walls for said case one of which is adjustable relativel to the other in a direction to vary the spoo receiving space therebetween, means operative subsequent to the entry of a spool into the case for moving said adjustable Wall a predetermined distance in a direction to increase the said spoohreceiving space between it and the opposite end wall and locking the same in such adjusted position, and means for passing a needle-thread loop around said case.

19. In a sewing machine, the combination with the needleand its operating mechanism, ot a case for receiving loosely thereinfthe underthread-carrying spool, end walls for said case one of which is adjustable relatively to ,the other in a direction to vary the spool receiving space therebetween, means operative to yieldingly hold said adjustable wall in a normally projected position toward the op posite end wall to be engaged and retracted by an inserted spool, means operative subsequent to the entry of the spool to further retract said adjustable wall from contact with the spool and hold the same in adjusted position, and means for passing a needlethread loop around said case. 7

20. In a sewing machine, the combination with the needle and its operating mechanism, of a case for receiving loosely therein the under-thread-carrying spool, end walls for said case one of which is adjustable relatively to the other in a direction to vary the spool-receiving space therebetween, means operative to yieldingly hold said adjustable wall in a normally projected position toward the opposite end wall to be engaged and retracted by an inserted. spool, means, includin g a lever, operative subsequent tothe entry of the spool to further retract said adjustable wall from contact with the spool and hold the same in adjusted position, and means for passing a needle-thread loop around said case.

r 21. In a sewing machine, the combination with the needle and its operating mechanism, of a .case for receiving loosely therein the under-t1mead-carrying spool, end walls for said case one of which is adjustable relatively to the other in-a direction to vary the spool-receiving space thcrebetween, means operative to yieldingly hold said adjustable wall in a normally projected position toward the opposite end wall to be engaged and retracted by an inserted spool, means, including a series of teeth on the adjustable Wall element and a cooperating lever, o erative subsequent to the entry of the spoo to further retract said adjustable wal from contact with the spool and hold the same in adjusted position, and means for passing a needle-thread loop around said case.

sw m

22, In secu ing; machine, the combination with the needle end its operating mechanism, of a case for receiving loosely therein the under-tildendrcearying spool end Walls for said one of wide adjustable relatively to the other in e, diree ion to vary the SPODFl'ECUll/lllfi space ther operative to yieldingly ho l nid adjustable wall in it normally projected position toward the opposi I end well to he engaged and retrusted by an inserted spool, a lever operative subsequent to the entry of the spoolto yieldingly en. 'd ndju tsble well elementund. for e 101' retract the some from contact with the spool, and means for passing a needlerthresd lorp uromid seid csse.

23. in s .i'nu:l1ine, the combination with the nee .nd its operating mechanism, of a cone. receiving loosely therein the UDdQT-tlllfifilifiitflfylflg' spool, end" Walls for said case 0 tivel spoo -rece operative t *ldingly hold said adjustable Wall in a normally projected position toward s end well to be engaged and rei'i'iserted spool, a lever operative subs-eon. ot to the en of the spool to other in s direction to vary the youn e enge sand ml ustu-ble well elemm one ftruct th v some from conteeth 1" 1e spool, menus cooperative with said leve to ho d the some either in o emtive pos' engagement wit 1 the edjustsbh v lenient or in inoperative position di; d tl'aerel em, and means for passing u edie-threml loop uround said case.

24. i In a. sewing inschinc, the combination with the needle and operating mechanism, of a ease for receiv loosely therein the under-threoil-carrying spool, end walls forssid case one of which is sdjustnblerelotively to the other, means independent of the spool for holding; seidedjustable well in adjusted position relative to the opposite we l menus operative to nutoznnticully proi said adjustable well in :1 directimi to it-je '5 the spool. nn case upon the release ol' the well by it uid holding means, and nui-a-ns for pa on :t needle thread, loop around said c:

25 h! o-z'iewing row-lime, the combination with the needle :2 ud its operating mechanism, of u (use in)? rwreivh q loosely therein the ujuder -tineml-w:ilying spool, end wells for one of which is adjustable l'ilflr the oth r, illi'z'llls independent of for Ming sold ndjustnble wall in etlve to-the opposite utive t :mtomulimlly l2 do well in e, dirertion to om its case upon the release is said holding menus, and I it needle thread loop ebetween, means izi SV 0? which is adjustable role-- one space therebctween, means.

i l l l l spool-receiving s ace therebetween, means operative to yielr ingly hold said mljustzible wall in a normally projected position toward the op osite end wall to be engaged and retracte by an inserted spool, means independent of the spool operative to hold said adjustable .wellin retracted position and also to release the some at will to permit it to be automatically returned to its normally projected position and eject the spool from its case, and means for passing it needle-thread loop around said case.

' 27. in a sewing machine, the combination with the needle and its operating mechanism, of a case, for receiving loosely therein the undenthrsdmarrying spool, end walls for said case one of which is adjustable relatively to the other in a direction to vary the spoolreceiving space therebetween, a spoolcase driver supporting the said end walls, and

meansnfor passing a needle-thread loop I around said case.

28. In a sewiixg machine, the combination withtlie'needle mid its operating mechanism, of a case for receiving loosely therein the under-thre2ulcurryin spool, end walls for said case one of \viich is yieldingl adjustable relatively to the other in :1 direction to vary the spool-receiving space therebetween, s spool-case driver supporting the said end walls; and means for passing the needle-thread loop around said case.

29. In a sewing nmchino, the combination, .with the needle and its operntmg mechanism,

of a case for receiving loosely therein the under-threwl-csrrymg spool, end wells for said (use one of which is spring-pressed and adjustable ridutivcly to" the other in a di roction to vary the spool-receiving space tlwrcbetwvecn, n sp'ool-cnsc driver supporting the said end walls, and means for passing a needle-thread loop uround said case. 3!), In a, sewing machine, the c0mbim1t1on= with the needle mul its operating mechanism, of a case for receiving loosely therein the undenthrm'nl-cnrrying spool, end Walls for said case one of which is adjustable relatively to the other in a direction to vary the spooln'occiviug space thcrcbctweon; and the other of which is movable in a direction to permit ol the insertion or removal of a spool into or from said case, a spoolcnse driver I supporting the said end walls, and means for passing the newlle-thrend loop around said case.

31. in a sewing machine, the combination with the needle and its operating, mechanism, of on uuder-tlwood-spool case having rm open end, menus supporting said spool-case, a

driver for impartingmovement "the spoolcase having an arm extending into a position thread loop around said case; I w 32. In a sewing machine, the combmation opposite the said open end of the spool-case -andform1ng an end wall therefor, the said arm bein movable to and from/its said position, an -means for passing the needlewith the needle and its, operating mechanism,

of an under-threadsspool case, aispool-case driver havingv an adjustable element sup-- ported thereby and extending into the'spoolcase and forming an end wall for engagement with a spool in -said spool case, means for holding said element'in' adjusted position relative to the spool to provide a thread passage space between it and the spool, and

. driver-having means for engaging with the a means for passing the needle-thread loop around said case." 7

y 33. In a sewing machine, the c'iiibinafion with the needle and its operating mechanism, of an under-thread spool case, a. spool-case opposite ends of the spool-case and also having an adjustable elementeu ported thereby and extending into the 's -oo -ease and forming an end wall for enga ment with a spool in said spool-case, mca s for holding said element in adjusted position relative to the spool to provide a thread-passage space be-.

tween it and the spool, and means for passing a needle-thread loop ar und said case.

of an under-thread-sp driver having heel am, too portions for en-' gaging with the spool -case and also having 34. In a sewing macl ine, the combination with the needle and its peratlng mechanism, 01 case, a spool-case an adjustable elements'upportedvthereby and extending into'the spiel-case and iormingan' end wall for engagement with a s )001 in said spool-case, means for, holding said element in adjusted position relative to the spool to provide a'thr'ead-passage ,space between it and the spool, and means for passing a, needlethread loop around/said case. i

35. In a sewing machine, the combination with the needle andlits operating mechanism,

of an under-thrcad-spool case having open ends, a spool-case (lIlVOI having heel and toe portions for engaging with the opposite open ends ofthe spool-caseaii dalso having an ad-- justable element supported therebyand extending into the spool-case, through one end thereof and forming an end wall fonengagement with a spool insaid s ool-case, and means for passing a nee e-thread loop around said case.

36. In a sewing-machine, the combination with the needle and its operatingmechanism, of an under-thread carrying'spool, means for passing theheedle-thread' loop about said spoolincluding a loop-spreader, and means for moving said spreader in a .path about the spool and turning the same simultaneously during such movement to change the angular position of its-thread-engaging portion laterally relatively to its path of movement about j the spool.

, with the needle and its operating mechanism,

of an under-thread carrying spool, means "for passing the needle-thread loop about said spool including a loop-spreader, and means including a rotary crank for moving the said spreader in a path about the spool and turning the same simultaneously 'during such movement to change the angular position of its thread-engaging portion laterally relativelv to its path of movement about the spoo Y Signed at Tiliin in the county of Seneca and State of flhio this 23rd day of January JASPER "VANNETTE. lVitnesses:

CALVIN D. SPITLER, J. W. IIERSHBERGH. 

